Pump packer



Oct. 2, 1928.

J. A. YERKES ET AL PUMP PACKER Filed Jan. 22, 1927 s @www wrm m VWvmMm N 6 T, I L A AHM ns 10C 0 a@ E W UT Patented Oct. 2, 1928.

UNITED res,

JOHN A. YEBKES AND BEES E. LEMMON, 0F LONG BEACH, CALIIIORNIA.

PUMP PACKER.

Application led January 22, 1927. Serial No. 162,712.

This invention relates to a packer for use on deep well pumps, and more particularly on what are known as inserted working barrel pumps wherein the pump barrel is arranged to be lowered into the sting of tubing or removed therefrom by means of the rods. In one type of such pumps itis the practice to support the pump barrels at the desired point in the well by means of a seat in the tubing on which the lower end of the barrel rests, such seat also forming a fluid 'tight joint and.

-It is an object of this invention to provide v a packer for the upper end of such a pump which may be expanded by a further lower` ing of the rods after the pump barrel has been lowered into position onits seat. Another object of this invention is the provision of such a packer wherein the packing is protected from damage while lowering the pump in the tubing. l

These objects together with otherA objects and corresponding accomplishments are obtained by means of the embodiment of our invention illustrated in the accompanying drawing in which:

Fig. 1 is a vertical section, taken onthe center line, through a packer in position on a pump barrel; Figs. 2 and 3 are sections taken ppn the correspondingly numbered lines of Referring to the drawing, the usual string of tubingv in a well is denoted by 5, within which is the barrel 6 for an inserted working barrel pump supported by any preferred form of a seat and anchored at its lower end (not shown) Within the barrel is the. usual plunger 7 with working valve 8, actuated by a pump rod 9. Threadedly secured to the upper end of the pump barrel is a mandrel sleeve 10, slidable within which is the mandrel 11. The mandrel sleeve is formed of two sections -102L and 10b threadedly secured together to form an annular space 12 between them having a shoulder or ledge at each end. This construction is such that the mandrel may be moved a limited distance relatively to the barrel.

About the exterior of the mandrel are spaced circumferential grooves 15 and 16, and on the interior of the mandrel sleeve is a similar annual groove adapted to register with one or other of the circumferential grooves, depending on whether abutment 14C is at one or the other limit of its travel. Vithin this annular groove is a split [resilient ring 17 designed to engage one of the circumferential grooves and yieldably secure the mandrel in position. The upper end of the mandrel sleeve has an upstanding annular lip 18 and a cap secured to the top of the mandrel has a similar depending lip 19. A resilient packing member 20, as of rubber, is disposed in the recess formed between.) these and about the mandrel. Secured to the pump rod is a coupling 21, which is adapted to be engaged with the cap on the mandrel shortly before the plunger reaches the lowest point in the barrel.

The packerzis expanded in the following manner. The pump is lowered into the tubing along with the/rods and during this operation the lower end of the mandrel is supported by the working valve, the pump barrel and connecting parts being supported by the mandrel This will nally be sufficient to force ring 17 to open, permitting the mandrel to slide within it-s sleeve and compress and expand the packing member 20 against'the wall of the tubing. This downward movement will continue until stopped by the abutment 14 reaching the shoulder on sleeve 1() forming the npper ledge of annular space 12. At this point, ring 17 will engage with groove 16 and again lock the parts against accidental displacement. It will be evident that the travel of the mandrel and the sizeof the packing may be proportioned with regard to the amount of expansion desired and prevent damage to the packing due to excessive pressure or distortion. It will also be evident that the lips 18 and 19 will prevent the edges of the packing leo being caught by projections or roughness in the tubing while lowering the pump, and that the packing is further shielded by the lips and protected by being no greater diameter when contracted than the outside of the vpump barrel.

What We claim is:

1. In a packer for well pumps, a pump barrel, a mandrel sleeve secured to the barrel of said pump, said sleeve having an annular space in the wall of the bore thereof with shoulders at the ends thereof, a mandrel slidable within said sleeve and having a cap, Jthere being an abutment on said mandrel adapted to engage either of said shoulders, packin means mounted on said mandrel between said mandrel sleeve and said cap,n said mandrel sleeve and said cap each having annular lips to embrace a portion of saidpacking, and means to force said mandrel through said sleeve to expand said packing.

2. In a packer for Well pumps, a pump barrel, a mandrel sleeve secured to the barrel of ysaid pump, said sleeve having an annular space in the wall of the bore thereof with shoulders at the ends thereof, a mandrel slidable within said sleeve and having a cap, there being an abutment on said mandrel adapted to engage either of said shoulders, packing means mounted on said mandrel between said mandrel sleeve and said cap, said mandrel sleeve and said cap each having annular lips to embrace a portion of said packing, means to force said mandrel through said sleeve to eX- pand said packing, and latch means between said mandrel and said sleeve.

In witness that we claim the foregoing We have hereunto subscribed our names this 17th day of January, 1927.

JOHN A. YERKES. BEES H. LEMMUN. 

